/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.gravitee.rest.api.idp.memory.authentication.spring;

import java.util.Collections;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

/**
 * @author David Brassely (david.brassely at graviteesource.com)
 * @author Nicolas GERAUD (nicolas.geraud at graviteesource.com)
 * @author GraviteeSource Team
 */
@Configuration
public class InMemoryAuthenticationProviderConfiguration {

  private static final String ENCODING_ALGORITHM_PROPERTY_NAME = "password-encoding-algo";

  private static final String NOOP_ALGORITHM = "none";

  private static final String BCRYPT_ALGORITHM = "bcrypt";

  @Autowired
  private Environment environment;

  @Bean
  public PasswordEncoder passwordEncoder() {
    String encodingAlgo = environment.getProperty(ENCODING_ALGORITHM_PROPERTY_NAME, BCRYPT_ALGORITHM);
    if ( encodingAlgo == null || encodingAlgo.isEmpty() ) {
      encodingAlgo = BCRYPT_ALGORITHM;
    }
    switch (encodingAlgo.toLowerCase()) {
    case BCRYPT_ALGORITHM:
      return new BCryptPasswordEncoder();
    case NOOP_ALGORITHM:
      return NoOpPasswordEncoder.getInstance();
    default:
      throw new IllegalArgumentException("Unsupported password encoding algorithm : " + encodingAlgo);
    }

  }

  @Bean
  public InMemoryGraviteeUserDetailsManager userDetailsService() {
    return new InMemoryGraviteeUserDetailsManager(Collections.emptyList());
  }
}
